Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

63°F

17°C

Humidity 86%
Wind Speed S 10 mph
Barometer 29.85 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 10 Mar 12:55 am CDT
Extended Forecast for

Dorchester IL

  • Overnight

    Overnight: Mostly clear, with a low around 60. South wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 80 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am.  Low around 51. Southwest wind 15 to 18 mph, with gusts as high as 34 mph.  Chance of precipitation is 80%.

    Low: 51 °F

    Slight Chance
    T-storms then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 2pm, then showers likely.  Temperature falling to around 47 by 5pm. Breezy, with a southwest wind 15 to 22 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph.  Chance of precipitation is 100%.

    High: 66 °F

    Breezy.
    T-storms then
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30. Northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 25 mph.

    Low: 30 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 59.

    High: 59 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 60. South wind 9 to 11 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 80. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.
Tuesday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 51. Southwest wind 15 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm before 2pm, then showers likely. Temperature falling to around 47 by 5pm. Breezy, with a southwest wind 15 to 22 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, with a low around 30. Northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 25 mph.
Thursday
Sunny, with a high near 51.
Thursday Night
Mostly cloudy, with a low around 42.
Friday
Mostly cloudy, with a high near 59.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 48.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 62. Breezy.
Sunday Night
A chance of rain and snow. Partly cloudy, with a low around 26. Blustery. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 38.
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ABOUT THIS FORECAST

 
Point Forecast:
Dorchester IL
 39.1°N 89.87°W (Elev. 659 ft)
11:41 pm CDT Mar 9, 2026
1am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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